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2015-06-27T18:06:55+05:30

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Lorries carrying heavy weights have large number of broader tyres to reduce tje amount of pressure exerted on the ground.
More number of tyres means more Area of contact.
Since pressure is indirectly proportional to Area , i.e.
P \alpha  \frac{1}{A} ,
Pressure is reduced, and hence it is beneficial for the lorry.
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